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Finding the Fourth Proportional to 160.11, 221.34 and 143.71

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Solution

The fourth proportional to 160.11, 221.34 and 143.71 is: 198.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.11 : 221.34 = 143.71 : x
  2. Step 2: Convert to fraction form
    160.11/221.34 = 143.71/x
  3. Step 3: Cross multiply
    160.11x = 221.34 × 143.71
  4. Step 4: Simplify right side
    160.11x = 31,808.77
  5. Step 5: Solve for x
    x = 31,808.77/160.11
  6. Step 6: Final answer
    x = 198.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.